Technical Manual
Table Of Contents
- Vocoder and Controller Boards Detailed Theory of Operation
- Introduction to This Section
- General
- Vocoder Board
- Controller Board
- Switching Regulator
- RX Signal Path
- TX Signal Path
- Controller Bootstrap and Asynchronous Buses
- Vocoder Bootstrap
- SPI Bus Interface
- Universal Connector and Option Selects
- Keypad and Display Module
- Controls and Control Top Flex
- Controller Memory Map
- Vocoder Memory Map
- MCU System Clock
- DSP System Clock
- Radio Power-Up/ Power-Down Sequence
- Notes
- Secure Modules
- Disassembly/Reassembly Procedures
- Troubleshooting Procedures
- Troubleshooting Charts
- Troubleshooting Waveforms
- Troubleshooting Diagrams
8-12
housing and the casting.
Vacuum Port Seal 1. Remove the vacuum port plug (see Section 13, page 72, item 62),
using a 7/64” hex torque bit; remove the o-ring; item 63.
2. Inspect the casting seal surface for debris or damage. Remove any
debris and replace the casting if damaged.
3. Install a new o-ring and reinstall the vacuum port plug to the
correct torque as specified in Table 2.
Vent Port Seal 1. Remove the seal label (66) that covers the vent port seal (65).
2. Remove the vent port seal.
3. Ensure that the casting’s surfaces are clean and free from any
adhesive or other foreign materials.
4. Install a new vent port seal, covering the two vent port holes, in
the small recessed area in the casting. Ensure that no oily
substances come in contact with the seal.
5. Install a new seal label over the vent port seal in the larger
recessed area in the casting. Press down evenly over the label’s
surface to ensure good adhesion.
Table 2 Submersible Radio Torque Specifications
Application
Torque
(in.-lbs)
Torque
(N•m)
Torque Bit
Part No.
Speaker Bracket Screw 2 0.23 66-80321B79
Vacuum Port Plug 6 0.68 66-80357B82